book Maths Puzzle Numerical Ability

(x+2/x-2) / (x^2-4/2x-4)

I don't even know where to begin on this. Could you help?

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book Other Question

find the axis of symmetry for the equation {{{y=(1/2)(x-4)^2+2}}} Solve. Explain your steps as you solve.
-2x-5=3x^2
Thanks